Correct Track will not not give you a true alignment. It will adjust the tracking which is how square the axles are with the frame and each other, but nothing else. It does not allow for adjusting toe in or our which is the wheels pointing toward or away from each other and it does not allow for adjusting camber which is how straight up and down the wheels are. In addition the fact that it lifts the trailer up also allows more leverage to the spring hangers and frame rails and there have been reports of them twisting as the result of this. I would just go to a good heavy duty truck frame/suspension shop and get a good alignment done. probably for the same or less money as well.
B.O.